How can you tell if your alarm company's...

[Sunder]

>From what I've heard (not confirmed) most of this stuff is either simple
sensors (continuity test) or it talks over a variant of rs422 -
unencrypted for things like keypads.  Not good, especially if these are
accessible on the outside.


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On Sat, 9 Aug 2003, Neil Johnson wrote:

> I have always wondered how the arm/disarm keypad works in most alarm systems.
> 
> I would hope it would send a reasonably secure code to the controller to 
> disable the alarm system, but I fear that it just a nothing more than a fancy 
> remote relay and can be easily bypassed.